But with his wife Kim due to give next month, the world No 2 has promised to rush home to Surrey if necessary.

Asked if he will pull out of the tournament even if he reaches the final on January 31, the Scot said: “For me, my child is more important to me, and my wife is more important to me than a tennis match, yeah."

Murray, who led Great Britain to Davis Cup victory in November, only took a week out at the end last season and plans to take a month out at home during February.

And despite not doing his usual training block in Miami, he stated he is ready and focused on winning a third Grand Slam title despite impending fatherhood.

“I think most days I think about that,” he said. “Just now it's a big change, you know, coming. It's very, very exciting. I'm sure everyone that's had their first child in here would have thought the same thing with just a few weeks to go.

“Again, I've never been in this position, so it's something new for me to deal with and handle, which is good. New experiences are always good, something to learn from.

“But, yeah, when I'm on the practice court and stuff, I'm very focused there. When I've been training, not distracted on that side of things. Just obviously after your practices and when you're away from the court, it's a bit different.”